CVE-2025-66036 is a cross-site scripting (XSS) vulnerability classified under CWE-79 affecting the Anjaliavv51 Retro platform, an online marketplace for vintage collections. The vulnerability exists in versions prior to 2.4.7 due to improper neutralization of input during web page generation, which allows attackers to inject malicious JavaScript code into web pages viewed by other users. This flaw can be exploited remotely without authentication, requiring only that a victim user interacts with a crafted link or input. The vulnerability impacts confidentiality and integrity by enabling attackers to steal session cookies, perform actions on behalf of victims, or manipulate displayed content. The CVSS 3.1 base score is 6.1 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, but requiring user interaction and partial impact on confidentiality and integrity. Although no known exploits are currently reported in the wild, the vulnerability poses a risk to users of Retro who have not upgraded to version 2.4.7 or later where the issue is patched. The vulnerability's scope is limited to the Retro platform, but given its e-commerce nature, the impact on user trust and data confidentiality can be significant. The patch addresses proper input sanitization and output encoding to prevent script injection. Organizations relying on Retro should verify their version and apply updates promptly to mitigate this risk.

For European organizations using the Retro platform, this XSS vulnerability can lead to session hijacking, unauthorized actions on user accounts, and potential data leakage. Since Retro is an e-commerce platform for vintage collections, compromised user sessions could result in fraudulent transactions, theft of personal data, or reputational damage. The vulnerability's exploitation requires user interaction, typically through social engineering or phishing, which may be more effective in regions with high online shopping activity. Additionally, the partial compromise of data integrity could allow attackers to manipulate displayed content, misleading customers or damaging brand trust. While availability is not impacted, the confidentiality and integrity risks can lead to financial losses and regulatory compliance issues under GDPR if personal data is exposed. The medium severity suggests a moderate but non-negligible threat, especially for organizations with significant customer bases in affected countries.

The primary mitigation is to upgrade the Retro platform to version 2.4.7 or later, where the vulnerability is patched. Organizations should implement strict input validation and output encoding on all user-supplied data to prevent script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts. Conduct regular security audits and penetration testing focusing on input handling components. Educate users and staff about phishing and social engineering tactics that could be used to exploit this vulnerability. Monitor web application logs for suspicious input patterns or unusual user activity. If upgrading immediately is not feasible, consider deploying web application firewalls (WAFs) with rules to detect and block XSS payloads targeting Retro. Finally, maintain an incident response plan to quickly address any exploitation attempts.